Air filter for vacuum cleaner



FIG. 1 is a top, front, right side perspective view of an air filter for a vacuum cleaner according to my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a bottom, front, right side perspective view thereof; and,

FIG. 9 is a top, front, left side exploded perspective view showing an environment of the vacuum cleaner air filter.

The broken lines illustrate environmental matter and form no part of the claimed design. 

CLAIM The ornamental design for an air filter for vacuum cleaner, as shown and described. 